Well I put all parts together. Soldering my heart out. Binded it to my radio, I got lights on the board and each motor beeps while moving slightly. I am now officially at the end of my level of expertise. I tried to run the wwi software to no avail. Anyway on the bright side, the beeping noise seems to drive my wife nuts.

Greetings to all iFlyers. I've bought subj from HK 2 weeks ago. That was ARF kit. TGY 9x and two 2650 3s lipos I've bought separately. I am noob in copters and RC at all. That's a virus from my another hobby's friend. He flies hexa and I've been so impressed by his videos. First step for after setup all components is building a training land gear. Flying for the first time was not so easy for me. Now collecting a flying experience....
Facts about iFly for me:
1. Fly right from the box - it's not about iFly4. I've done some PID changes before it begins to hover.
2. ESC#3 burned on the third flight. Overheating... Fixed with Arctic Cooling VR005 heatsink kit ($5 with glue). Already ordered spare ESC#3. Burned ESC was temporary fixed by my friend. He soldered 2 7amp MOSFETs instead of broken one. There are F7832 -3pcs and 4407A-3pcs on each ESC.
3. One CCW prop was broken while crashing with #3ESC. 1047 prop found in local store. Flying this way until spare props arrival.
4. Some research was done while fixing ESC - each ESC controlled by flight controller according to it's number written in FIRMWARE. It doesn't matter in which port you connect ESC on the main PCB - it will be driven by it's number.
5. #2 motor running with noise. Others are smooth. Opening shows that bearings have distorted grease seal - the result of improper installation.
Bearing dimensions 3x8x4 mm. Thinking of replace..

Well I put all parts together. Soldering my heart out. Binded it to my radio, I got lights on the board and each motor beeps while moving slightly. I am now officially at the end of my level of expertise. I tried to run the wwi software to no avail. Anyway on the bright side, the beeping noise seems to drive my wife nuts.

Hi Alex and welcome to the iFly-4 thread...
You make some interesting observations... and you are the first to fix an ESC, I think - well done!Can you share your PID settings? I would be interesting to try these on my iFly to compare it with the default settings that I am using...
I too have noticed one motor (No1) sounds a little noisier than the rest. I think their quality control may not be too good...
I have been carrying a camera and gimbal as well as flying with a heavier 3300 battery, but so far have not had any 'hot' ESC issues. They only seem to get warm... Maybe it's because most flying has been gentle, and in cool weather.

#2 LED does not work. I've spent a bit of time looking to see if I could piggy back off an adjacent supply. But each LED has it's own circuit.
Now I'm wondering if the flashing sequence indicates the mode of it's own motor.

Mine arrived (from unmannedtech rather than HK) in a smaller mostly plain brown box (with ideafly stamped on the top) but with the same bits inside all wrapped in bubblewrap, rather than being in that moulded plastic tray...

I also notice that my motors are black on top, not red...

Mine did arrive with a deans type connector, but quite a lot of the larger HK batteries are now fitted with that yellow one, so maybe that's why HK have asked for that connector?

Don't be tempted to connect a battery balance plug to the 'power' socket on the FC. I did that and can confirm that it will destroy the FC